A Guide To Deduction is an interesting book. Written by Hannah Rogers, the Author of The Art of Deduction and website: http://aguidetodeduction.tumbler.com.
While reading the book, I got the sense the author intended it to be a book written on how to be a detective. Each chapter has a quote from “SH,” which I assumed is Sherlock Holmes. The book is essentially a collection of deductive rules of thumb taken from her tumbler blog. These short deductive rules cover such areas as spotting things about a person at work, writing, sports, travel, home, lying and health. The author does not include any proof to back up her assertions regarding the deductions she lists. The book also has many typos and words missing in the middle of sentences. It has a simple index but provides no additional sources for further research and training.
Other books on how to deduce people, such as The Monographs, How To Instantly Size-Up Strangers Like Sherlock Holmes and The Deduction Guide are better suited for deducing people because they show you how to actually do it. Mastermind: How To Think Like Sherlock Holmes shows you how Sherlock thinks but not how to think like him and make the deductions he makes.
Another major gripe I have with A Guide To Deduction is the manipulation of the Amazon ratings. It seems that after the book first came out on December 10th, someone named “anonymous” gave it a bad one star review on December 18th. Then suddenly on December 23rd, the book received 10 five star ratings and good reviews (most which were not verified purchases). Also, on the UK amazon website, author Ben Cardall also gave the book a glowing 5 star review, which seemed suspicious to me being that both A Guide To Deduction and The Monographs are published by MX Publishing. I believe most of the reviews for this book are designed to pump up the ratings and increase the book sales.
I liked the book but it is not as amazing as some of the other reviews would have you believe. In my opinion, it promises more than it delivers.